- a river in the Yukon Territory of NW Canada and SE Alaska, flowing S to the Pacific Ocean. 260 miles (418 km) long.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for alsek
The Alsek was very high and running at least ten miles an hour.
How changed was the valley of the Alsek since last they looked upon it!
Green spruce forests were sprinkled over the snowy surface of the Alsek valley and its bordering plateaus.
Then followed the Chilkat, the Alsek, and finally, all the great rivers of the North.Girl Scouts in the Adirondacks
Lillian Elizabeth Roy